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package com.sun.enterprise.glassfish.bootstrap;

import com.sun.enterprise.module.ModuleDefinition;
import com.sun.enterprise.module.ModulesRegistry;
import com.sun.enterprise.module.common_impl.AbstractFactory;
import com.sun.enterprise.module.common_impl.ModuleId;
import com.sun.enterprise.module.single.SingleModulesRegistry;

import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Factory which provides SingleModulesRegistry
 * This should actually be in HK2 workspace.
 *
 * @author bhavanishankar@dev.java.net
 */

public class SingleHK2Factory extends AbstractFactory {

    private static Logger logger = Util.getLogger();
    ClassLoader cl;
    ModulesRegistry modulesRegistry;

    public static synchronized void initialize(ClassLoader cl) {
        if (Instance != null) {
            if (logger.isLoggable(Level.FINER)) {
                logger.finer("Singleton already initialized as " + getInstance());
            }
        }
        Instance = new SingleHK2Factory(cl);
        if (logger.isLoggable(Level.FINER)) {
            logger.finer("Reinitialized singleton as " + getInstance());
        }
    }

    public SingleHK2Factory(ClassLoader cl) {
        this.cl = cl;
        this.modulesRegistry = new SingleModulesRegistry(cl);
    }

    @Override
    public ModulesRegistry createModulesRegistry() {
        return modulesRegistry == null ? modulesRegistry = new SingleModulesRegistry(cl) : modulesRegistry;
    }

    @Override
    public ModuleId createModuleId(String name, String version) {
        return new ModuleId(name);
    }

    @Override
    public ModuleId createModuleId(ModuleDefinition md) {
        return new ModuleId(md.getName());
    }
}
